CH1MA3RA, that's a really cool alternate reality that you've come up with. I dig stuff like this
I think I would've been tempted to put SLC in the now-major Western League, as travel by rail from any of the coast cities to Denver would have naturally gone right through SLC. It wasn't until the very end of the 50's that MLB teams transitioned primarily from train to airplane travel. So it stands to reason that in your 1954 WL, train travel would've still been the primary mode of transpo for the next few years, at least.
And during this time when the real-life PCL had been pushing for Major League status, Sacramento was one of its weakest franchises/markets (& a strong argument against MLB status). So that's probably who I would've bumped in favor of SLC.
But that's not criticism of your league, which is a really neat idea!

I just like to bat this stuff around...
So, assuming your sim includes the 1954 AL & NL as they were, what do you plan to do with the Dodgers, Giants, 60's expansion, etc?